A Few Questions......

I was playing with a friend who is newer to the game and he played Ferocity on one of his creatures.

Lets say that it was a 2/2 creature. If I block with a 3/3 does the lethal damage kill it or does the +1/+1 counter trigger as it becomes blocked.

Also, what happens if I block with 3 1/1's does each one trigger the counter or is it considered on block.

My other concern is with alpha status and druid's call enchanting a squirrel. If lethal damage is dealt to the creature, which resolves first? - the creature dying or the 1/1 squirrels coming into play giving it +2/+2 and thus not dying............ever (from combat damage)??

Ferocity: The ability gets triggered when it becomes blocked, so it'll be a 3/3 and both creatures will die if you blocked with a 3/3.

For the 3 1/1's, it only triggers once since all blocks are considered simultaneous and it doesn't say "for each creature that blocks" like rampage does.

Alpha Status/Druid's Call: Druid's Call is triggered when the creature is dealt damage, so the damage has been resolved already and the state-based check of lethal damage is next before Druid's Call resolves. So the creature will die and then the Druid's Call will resolve (barring no other additions to the stack).